I purchased my Z1 for an older Cadillac a few months ago.. my old car died and I bought a 2006 DTS Cadillac. My installer said that a special interface was needed but he didn't carry it and wasn't sure where to order it from. Have any of you installed a Z1 in a DTS Cadillac and where did you purchase the interface? Do you have a part number and location that I might be able to order it or am I not going to be able to install the unit in my new car?

Mark